Wireless energy transfer (WET) is a green enabler of low-power Internet of Things (IoT). Therein, traditional optimization schemes relying on full channel state information (CSI) are often too costly to implement due to excessive energy consumption and high processing complexity. This letter proposes a simple, yet effective, energy beamforming scheme that allows a multi-antenna power beacon (PB) to fairly power a set of IoT devices by only relying on the first-order statistics of the channels. In addition to low complexity, the proposed scheme performs favorably as compared to benchmarking schemes and its performance improves as the number of PB's antennas increases. Finally, it is shown that further performance improvement can be achieved through proper angular rotations of the PB.
@article{arxiv.2008.12507,
title = {A Low-Complexity Beamforming Design for Multiuser Wireless Energy Transfer},
author = {Onel L. A. López and Francisco A. Monteiro and Hirley Alves and Rui Zhang and Matti Latva-aho},
journal= {arXiv preprint arXiv:2008.12507},
year = {2020}
}
Comments
4 figures, 1 algorithm, accepted for publication in IEEE Wireless Communications Letters